Amsterdam — "No, no, no," Bob Dylan says sharply when asked if aspiring songwriters should learn their craft by studying his albums, which is precisely what thousands have done for decades. "It's only natural to pattern yourself after someone," he says, opening a door on a subject that has long been off-limits to reporters: his songwriting process. "If I wanted to be a painter, I might think about trying to be like Van Gogh, or if I was an actor, act like Laurence Olivier. If I was an architect, there's Frank Gehry. "But you can't just copy somebody. If you...